1 /*
2 * Copyright (C) 2012 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #include <stdint.h>
18 #include <sys/types.h>
19
20 #include <cutils/log.h>
21 #include <utils/Errors.h>
22
23 #include "PowerHAL.h"
24
25 namespace android {
26 // ---------------------------------------------------------------------------
27
PowerHAL()28 PowerHAL::PowerHAL() : mPowerModule(0), mVSyncHintEnabled(false) {
29 int err = hw_get_module(POWER_HARDWARE_MODULE_ID,
30 (const hw_module_t **)&mPowerModule);
31 ALOGW_IF(err, "%s module not found", POWER_HARDWARE_MODULE_ID);
32 }
33
~PowerHAL()34 PowerHAL::~PowerHAL() {
35 }
36
initCheck() const37 status_t PowerHAL::initCheck() const {
38 return mPowerModule ? NO_ERROR : NO_INIT;
39 }
40
vsyncHint(bool enabled)41 status_t PowerHAL::vsyncHint(bool enabled) {
42 if (!mPowerModule) {
43 return NO_INIT;
44 }
45 if (mPowerModule->common.module_api_version >= POWER_MODULE_API_VERSION_0_2) {
46 if (mPowerModule->powerHint) {
47 if (mVSyncHintEnabled != bool(enabled)) {
48 mPowerModule->powerHint(mPowerModule,
49 POWER_HINT_VSYNC, (void*)enabled);
50 mVSyncHintEnabled = bool(enabled);
51 }
52 }
53 }
54 return NO_ERROR;
55 }
56
57 // ---------------------------------------------------------------------------
58 }; // namespace android
59
60